Lock.



C. E. BIWLES.

, LOCK. APPLICATION man mm; 20. 1am

Patented Dee. 11,19171.

V C. E. BAYLES.

LOCK.

. APPLICAHON FILED JUNEZO. 191T- 1,249,710. Patented Dec. 11, 1917.

2 SHEETSSHEET 2.

cnaranns n. Barrens, or suntan lillAl-[tjt specification of LcttersPatent.

lt atentedliftecl 11, 171 117.

Application filed 1 1111620, L917. Serial No. 1'5,94;5.

To all whom it may concern:

Be it known that l, CHARLES E. lhxvnns, a citizen of the United States,residing at Bru'leyl in the county of Cassia and citate of Idaho, haveinvented certain new and useful Improvements in Locks, of which thefollowing is a specification.

This invention has tor its object the provision of a simple andinexpensive door look so constructed that the latch bolt maybe setagainst release except upon the insertion of a proper key in the lockcase. The invention designed more particularly for mortiso locks andseeksto provide a mortise lock which will require the torn'lation ofonly a single hole in the door. only, ho\v ever, he applied to lookshating separate latch and key bolts. The invention isillustrated in theaccompanying nrawings and will be hereinafter fully described, thenovelfeatures being subsequently particularly pointed out in the claimsfollowing the detailed description.

lln the annexed drawings:

lligure 1 is a vertical section of a portion of a door having myimproved lock applied thereto, a portion of the lock casing beingremoved; a

Fig. 2 is a similar view showing the bolt set against release;

Fig. 3 is a longitudinal section on the line 3-3 of Fig. 1; p

at is a detail transverse section on the line l l of Fig. 1;

F ig. is a detail transverse section on the line 55 of Fig. 1;

Fig. 6 is a detail perspective viewvoi the hub and the parts cooperatingimmediately therewith.

The door 1 may be of any construction and in the same I bore a mortise,indicated at 2, for the reception of the lock case which is preferablycircular in cross section so as to fit snugly in the mortise formed inthe door and is retained in place by a lock plate 3 secured in the edgeof the door and extend ing over the outer end of the lock case. The lockcase is indicated by the numeral d and, as shown clearly in Figs. 4; and5, is constructed of two members which when placed together will form abody circular in cross sectionand inclosing the bolt and the otheroperating parts. The line of division between the two members of thelockcase may be located as may be deemed most advan tageous, the object oiforming the case in bled. within one of the lock case n'lelnbers and theother lock case member is then placed in position and secured by one ormore screws or other tastenings 5 inserted through. the walls of the twomembers. The lock case is provided with suitable transverse openings toreceive a hub 6 in which is fitted the knob spindle 7, said spindlebeing of the usual angular formation and equipped with knobs 8 so thatit may be conveniently rocked and thereby actuate the hub, The belt 9slidably fitted in the iron t and oi? the casing and is constructed witha projecting beveled tongue 10 which is adapted to enter a socket in thedoor fralneaud thereby hold the door in closed position. The bolt isprovided witha longitudinal rib 11 onone side to engage a longitudinalgroove 12 in the lock case and be thereby prevented from rotation, it.coiled spring 13 has one end seated in a socket 14l in the inner end ofthe bolt and its opposite endbearino' a ainst a ston 15 orovided o o lwithin the lock case, the said spring serving to hold the bolt normallyprojected and yielding readily to permit the bolt to clear the edge ofthe door frame or the keeper or look strike when the door is beingclosed. In one side of the bolt is nevidcd a recess l6,the walls oilwhich flare rearwardly and at the tront end of which 1s pivoted thefront end of a link 17. This link 17 at its rear end carries a sleeve 18in which is telescopically fitted thehead est a similar hook or link 19which has its rear end pivotally engaged. in a socket 20 formed in oneend oi? thehub 6. The telescopic connection of the links or hooks 17 and19a permit them to slide relative to each other when the door is beingclosed and the bolt thereby pushed into the casing, but if the spindlebe retated or rocked so as to release the bolt the consequent rocking ofthe hub 6 will ere ert apull through the hooks 19 and 17' upon the boltto withdraw it from the keeper or the socketin the door frame, The headoi the link 19 will of course, be so proportioned as to prevent binding.To limit the rocking movement of the hub 6 an d thereby avoid bending orbreaking or the hooks 1'? and 19, which would render the latchinoperative, l. recess or rabbet the end oi the hub, as shown at 21,concentrically with the llltl in the path of the depending lug 26.

spindle to receive a lug or projection 22 on the lock case. The rabbet21 will permit the hub to move past the projection 22 when it is desiredto release the bolt but the extent of such movement will be limited byan end wall of the rabbet coming in contact with the projection, as willbe readily understood.

At one side, preferably the upper side, the hub 6 is provided with aflattened portion 23 and this flattened portion may extend entirelyacross the surface of the hub or it may extend only partway of the sametransversely thereof, as may be preferred. A dead latch or wedgingmember 24; is slidably mounted in the lock case in rear of the hub andhas its forward end 25 reduced and adapted to extend over the flattenedsurface 23 between the same and the lock case. The said dead latch isconstructed with depending lugs or ribs 26 and 27 between which is akeyreceiving groove 28 and a key hole 29 is provided through the doorand the lock case so that if a key be fitted therein and turned it willengage one or the other side wall of said groove 28 and also engage theroof of said groove so as to slightly lift the dead latch and also movethe same longitudinally of the lock case. Spaced lugs 30 and 31 areprovided in the lock case, the lug 8O sup porting the forward portion ofthe dead latch and also serving as a stop to limit the forward movementthereof by being disposed The lug 31 is disposed at such a point thatwhen the dead latch is retracted, the said lug will be in advance of thedepending lug 27 on the latch, as shown in Fig. 1, thereby tending tohold the dead latch in its retracted position. When a key is insertedand manipulated to set the dead latch, the latch will clear the lug 31and ride over the same, dropping into engagement with the front sidethereof when it has reached the proper position, as shown in Fig. 2. Thelugs 27 and3l Will then tend to prevent accidental release of the deadlatch and, to aid in the engagement of the lugs 27 and 31 and to holdthe dead latch in proper engagement with the turning key, a spring 32 issecured in the lock case and has its free end playing in a longitudinalrecess or groove 83 in the upper side of the dead latch, as shown and aswill be readily understood.

It is thought the operation and advantages of my improved lock will bereadily understood from what has been said. The spring 13 holds the bolt9 normally projected and yields readily to movement imparted thereto bycontact with the lock strike on the door frame or by rocking of the hub6 through manipulation of the knob spindle. When it is desired to setthe dead latch the door is closed and after the bolt has been engaged inthe keeper, the proper key is inserted and turned to move the latch orwedge outwardly. The wing or ward of the key will thus be broughtagainst the forward wall of the groove 28 and will lift the latchslightly so that it will clear the lug S1 and, as the movement of thekey continues, will be pushed forward to the position shown in li 2 withits front end resting on the llattened surface 23 of the hub between thesame and the top of the lock case. rotation of the knob spindle willthus be prevented and the door can then be opened only by the insertionof the key and the movement of the san'ie in the opposite direction.When the 7 moved in the opposite direction, it will li it the dead latchso that it will cl *ar the leg 31 and then move rearward over the same,dropping into engagement behind it when it has cleared the hub.

The device is exceedingly simple in the construction and arrangement ofits parts and may, therefore, be produced at a very low cost. t may bereadily applied to a door in a few minutes and will be found highlyeliicient for the purposes for which it is designed.

Having thus described the invention, what is claimed as new is:

1. Ina lock, the combination of a lock case a bolt slidably mountedtherein and provided in one side with a recess havingrearwardlydiverging walls, means for holding the bolt normally projected, a hubrotatably mounted in the lock case, a link having its outer end pivotedto the bolt at the apex of the recess therein, and a second link havingits inner end pivoted to an end of the hub and its outer endtelescopically fitted to the inner end of the first-mentimied link.

2. In a lock, the combination of a lock case, a bolt slidably mounted inthe case, a hub rotatably mounted in the case and opcratively connectedwith the bolt, a stop member disposed transversely in the case in rearof the hub, a lateral projection on one side of the case near the rearend thereof, and a dead latch movable into engagement between the huband the case to prevent rotation of the hub and having depending lugs,one of said lu s engaging the transverse stop to limit the forwardmovement of the latch and the other of said lugs arranged to engage thesaid lateral projection and hold the latch in either of its setpositions.

In testimony whereof I allix my signature.

(ev is CHARLES E. BLYLES. [1.8.]

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 8.

